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     bindat — assign a local protocol address to a socket


     Standard C Library (libc, -lc)


     #include <sys/types.h>
     #include <sys/socket.h>

     #include <fcntl.h>

     bindat(int fd, int s, const struct sockaddr *addr, socklen_t addrlen);


     The bindat() system call assigns the local protocol address to a socket.  It works just like
     the bind(2) system call with two exceptions:

           1.   It is limited to sockets in the PF_LOCAL domain.

           2.   If the file path stored in the sun_path field of the sockaddr_un structure is a
                relative path, it is located relative to the directory associated with the file
                descriptor fd.  If bindat() is passed the special value AT_FDCWD in the fd
                parameter, the current working directory is used and the behavior is identical to
                a call to bind(2).


     The bindat() function returns the value 0 if successful; otherwise the value -1 is returned
     and the global variable errno is set to indicate the error.


     The bindat() system call may fail with the same errors as the bind(2) system call for a UNIX
     domain socket or with the following errors:

     [EBADF]            The sun_path field does not specify an absolute path and the fd argument
                        is neither AT_FDCWD nor a valid file descriptor.

     [ENOTDIR]          The sun_path field is not an absolute path and fd is neither AT_FDCWD nor
                        a file descriptor associated with a directory.


     bind(2), connectat(2), socket(2), unix(4)


     The bindat was developed by Pawel Jakub Dawidek <> under sponsorship from
     the FreeBSD Foundation.